Electrochemical-Mechanical Hydrogen Compressor Integration
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Solution Overview
Problem
Current methods for producing highly compressed, pure hydrogen using electrochemical hydrogen compressors face challenges such as high power consumption, complexity, and water management issues, limiting their efficiency and scalability.
Innovation Solution
Integration of an electrochemical hydrogen compressor with a mechanical compressor, where the electrochemical compressor is used for initial compression and purification, followed by additional mechanical compression stages, with a hollow shaft for water supply and micro-openings for improved proton exchange membrane humidification, and a Peltier element for hydrogen cooling to enhance purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If electrochemical hydrogen compressor is used for high pressure compression, then hydrogen purity is improved, but power consumption increases significantly
Solution Approach 1:
The compression process is divided into multiple stages: first stage uses electrochemical compression for purification and initial compression, second stage uses mechanical compression for final high pressure. This segmentation allows each component to operate in its optimal efficiency range, reducing overall power consumption while maintaining high hydrogen purity.
2Stress or pressure
If multi-stage electrochemical compression is used to achieve higher pressures, then compression pressure is improved, but device complexity increases
Solution Approach 1:
The electrochemical compressor and mechanical compressor are merged into a single integrated system with shared housing, common hydrogen inlet, and coordinated operation. This combination achieves high compression pressure through multi-stage process while reducing overall system complexity compared to separate systems.
Solution Approach 2:
The mechanical compressor serves dual functions: acting as a seal for the electrochemical compressor and providing the second compression stage. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure.
3Stress or pressure
If mechanical compressor is used for hydrogen compression, then compression pressure is improved, but hydrogen contamination with lubricant occurs
Solution Approach 1:
The electrochemical compressor performs preliminary compression and purification of hydrogen before it enters the mechanical compressor. This preliminary action removes most contaminants and reduces the volume of hydrogen requiring mechanical compression, minimizing lubricant contamination risk while maintaining high purity.
Solution Approach 2:
The electrochemical compressor acts as an intermediary between the hydrogen source and the mechanical compressor, providing a buffer that protects the mechanical system from directly handling large volumes of hydrogen, thereby reducing lubricant contamination.
4Stress or pressure
If mechanical compressor is used for hydrogen compression, then compression pressure is improved, but vibrations and noise are generated
Solution Approach 1:
The electrochemical compressor performs the first compression stage in a vibration-free manner, reducing the compression ratio required from the mechanical compressor. This preliminary action diminishes the mechanical stresses and vibrations generated in the second stage.
5Manufacturing precision
If electrochemical hydrogen compressor is used, then hydrogen purity is improved, but water management complexity increases
Solution Approach 1:
The water supply system for membrane humidification is merged with the mechanical compressor's lubrication system. Water is supplied through existing lubrication channels, eliminating the need for separate water delivery infrastructure and reducing overall system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption, simplifies the system, and increases the efficiency and purity of hydrogen production, enabling higher pressures with lower complexity and improved water management.
Implementation Method 1
At the anode, the hydrogen is split into protons and electrons. The protons are electrochemically driven across the proton exchange membranes to the cathode, where they recombine with redirected electrons to form hydrogen.
Implementation Method 2
separated from water using a Peltier element
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to a device for compressing and purifying hydrogen, comprising an electrochemical hydrogen compressor (1) with a proton exchange membrane (2) separating an anode (3) from a cathode (4), wherein the electrochemical hydrogen compressor (1) is integrated into a mechanical compressor (5) with a rotatably mounted shaft (6). The invention further relates to a method for compressing and purifying hydrogen using a device according to the invention.